www.techbook.de

Issued by R3

About this certificate

This digital certificate with serial number 03:5b:82:c0:e3:95:4b:c3:af:98:12:5e:e0:aa:94:33:d0:6a was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.


We have idenified some issues with this certificate:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=www.techbook.de

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 03:5b:82:c0:e3:95:4b:c3:af:98:12:5e:e0:aa:94:33:d0:6a
Serial Number (int): 292476354361470442054466322171083558735978
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 99:cf:b4:63:16:58:1b:e2:c2:b2:c0:94:fd:9b:6f:e5:5a:e3:a1:eb
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 71:58:66:49:f3:0b:65:19:3b:03:5f:ec:4f:39:b5:a0:82:79:e9:25
Fingerprint (sha256): 05:ab:64:d3:a1:bb:c8:6e:6b:6c:0b:4d:2b:2c:9b:71:eb:83:3f:54:d3:4f:58:19:89:4b:4d:d1:dc:23:40:87

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate www.techbook.de

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.techbook.de

Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

asset.techbook.de
www.techbook.de

Other certificates including the domain name techbook.de

(limited to 100 certificates)
link.mailer.techbook.de
ast.myhomebook.de
data-50c00d5d12.techbook.de
link.mailer.techbook.de
kmp.techbook.de
techbook.de
tortuga.cloud
static.techbook.de
cmp.axelspringer.com
image.techbook.de
static.techbook.de
stage.techbook.de
tortuga.cloud
*.myhomebook.de
*.techbook.de
static.techbook.de
techbook.de
techbook.de
stage.techbook.de
data-50c00d5d12.techbook.de
techbook.de
www.techbook.de
stage.techbook.de
techbook.de
techbook.de
static.techbook.de
techbook.de
static.techbook.de
image.techbook.de
static.techbook.de
link.mailer.techbook.de
cmp.autobild.de
techbook.de
link.mailer.techbook.de
kmp.techbook.de
data-7a534833b2.techbook.de
techbook.de
tortuga.cloud
techbook.de
techbook.de
m.purmail.techbook.de
*.techbook.de
link.mailer.techbook.de
cmp.autobild.de
productstorybundles.techbook.de
*.myhomebook.de
*.stylebook.de
static.techbook.de
tortuga.cloud
cmp.autobild.de
techbook.de
cmp.autobild.de
static.techbook.de
static.techbook.de
image.techbook.de
static.techbook.de
static.techbook.de
static.techbook.de
*.myhomebook.de
techbook.de
pur.techbook.de
stage.techbook.de
image.techbook.de
static.techbook.de
static.techbook.de
techbook.de
stage.techbook.de
techbook.de
link.mailer.techbook.de
techbook.de
static.techbook.de
static.techbook.de
kmp.techbook.de
data-50c00d5d12.techbook.de
image.techbook.de
cmp.autobild.de
pur.techbook.de
techbook.de
pur.techbook.de
link.mailer.techbook.de
static.techbook.de
techbook.de
link.mailer.techbook.de
static.techbook.de
link.mailer.techbook.de
data-7a534833b2.techbook.de
static.techbook.de
*.travelbook.de
kmp.techbook.de
ast.myhomebook.de
*.myhomebook.de
kmp.techbook.de
image.techbook.de
data-7a534833b2.techbook.de
static.techbook.de
businessinsider-fr.businessinsider.fr
techbook.de
static.techbook.de
techbook.de
link.mailer.techbook.de

Certificate

The complete raw certificate details for www.techbook.de in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3Vhpk0AoKXz2jE2bc6QC
wwPgP8NJD8ruIy4WTaUerJuTodcJVA2AstDEk6kDaYhlkX+ECZEOnmRsdC0JtViP
3C7AX4AKuWBmtKylgteKRyq7zRO3XU3FgTD9nG76nl0aKTr8xtoy6LVf3m4KIh4Z
Llf89Eo6OornbPgyYdEw+QH0oVgvLNi0R2h0/GAmeVEbBNuJhomwCILs4t0fVb42
sPQN4FMIAW4TYezgV+1Jo7Bczd/ycUU4Q2Nug2uwUIWcgbzTPW0qdpW3Yr6SvHp+
Bm7t1XMZ6G9U13YxHvVyqaoTzrJNCAsncvb6ukxwYke9PGUq+pmeVzhE9otoloBS
gwIDAQAB
-----END PUBLIC KEY-----

ASN.1 decoded

 [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2
 . . . . . . . . [c:0|t:2|false] INTEGER 292476354361470442054466322171083558735978
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'US'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-01 11:18:06 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-06-30 11:18:05 +0000 UTC
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'www.techbook.de'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption)
 . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 27942263178387021229000723621126999315077097094922119786360216922316685021805472103256539506007733930663037108318818118289700298142264146406650250878817004850048839439655713022569935061053445094598823415079868863994873090177896344819465190518414947553217853740158348671921778568315604276203321382746990695765652178704847104684639659788880382241042068347089237594246447825964202636333169420922938571433991435411008801258259133148617585622416406755276850121999665456665427488449896853596638324531903848978322153465836952797327549479738295863296681083286959636937299896396201346772269592729279366037423754634243130544771
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537

 . . . . . . . . [c:2|t:3|true] ORAddress 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (3 bits)
							05a0
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							99cfb46316581be2c2b2c094fd9b6fe55ae3a1eb
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (73 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.o.lencr.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (38 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'asset.techbook.de'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.techbook.de'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (12 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018e999869170000040300463044022002ffe63abd364fd8b129bcb408496f7438b4585be5b944c378b629b22a1825a10220720f9be3bfea868a46d533778fa0a6876c95ec0faf7bb2e8980bf4a1b60e75a600770048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018e999868fe0000040300483046022100b8c651f10fac3fe1da032b8c74d22471553d96fbc22cdb559a700b3276f12c9002210096025e5a5ff2f27bb1eaa4dbdbf39acb201d1253bf568c3bab801544559a14bd
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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